As at 3 in Figure 3-1,
in most application programs you
embed the CONNECT command
to start a DBE session in a program:
EXEC SQL CONNECT to '../sampledb/PartsDBE';
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If autostart mode is ON at run time, this command starts a
DBE session. If autostart mode is OFF, a DBA
must issue a START DBE command before the program can
be executed. Regardless of the autostart mode in effect, the
program user must have CONNECT and RUN authority for this
command to execute.
You can embed the START DBE command in a program to start a DBE
session if the
owner of the program has DBA authority. However, only one copy
of the program can be executed at
a time, by a user with DBA authority.
For single-user DBEnvironments, this constraint poses no problem.
In a multiuser environment, however,
once a DBEnvironment
is started, only the CONNECT command
can be used to initiate additional
DBE sessions.
Place the DBE session initiation command
in an executable section of your program such that
it executes at run time before all other
SQL commands except the WHENEVER command.
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